The patented one way valve system has minimum airway resistance and provides extremely effective viral and bacterial filtration, which prevents contaminants from reaching the rescuer. The filter is strategically located above the one way valve system to prevent blood, vomit or debris from saturating the filter, rendering it inoperable. The mask is equipped with a standard 22mm fitting which will allow the attachment of any standard resuscitation device. All masks come standard with an oxygen inlet which can be left blocked if not required. Mask collapses for storage into its clamshell case.